Simple wrapper functions for Telemetry to make taking some metrics a bit easier.

With Telemetry wrappers you can define a function that will have its execution time measured and sent as a :telemetry event. To use the wrappers simply include use TelemetryWrappers in your module

You can then define a function using deftimed macro:

    deftimed timed_function(a, b), [:a, :b] do
      a + b
    end

This will define a timed_function/2 function like you would expect from def but it will also emit a :telemetry event [:a, :b] with the contents %{call: timing} where timing is the time the function took to execute in microseconds.

The metric name is optional and will default to [:timing, name] where name is the name of the function (without arity).

If you would like to define a private function you can instead use deftimedp

    deftimedp timed_priv_function(a, b), [:a, :b] do
      a + b
    end